Type-writing machine.



No. 896,789. .PATENTED AUG. 25, 1908.

` 0. WOOIVVVARD.4 TYPE WRITING MACHINE.

APPLICATION FILED JAN.31, 1906.

3 SHEETS-SHEET l.

NVENTDR:

w-hs ATTDFQNEY No. 896,789. PATENTED AUG. 25, 1908;

0. WOODWARD.

TYPE WRTING MACHINE.

APPLICATION FILED JAN. 31, 1906, Y v 3 SHEETS-Smm 2,

HIE TTmFiNEr No. 896,789. PA'I'BNTBD AUG. 25, 1908.

O. WOODWARD.

TYPE' WRITING MACHINE.

APPLIOATION PIL-Bn JAN. a1 190e.

' asHBETs-SHEBT s.

WITNEEEEE: NVENTUR UNITED sTATES P OSCAR W OODWARD, OF NEW. YORK, N. Y., ASSIGNOR TO DENSMORE TYPEWRITER COMPANY, OF SYRAOUSE, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING IltLACIIIIIQ'E.A

Specification of Letters IPatent.

Patented Aug. 25, 1908.

Vapplication.filed January 31,1906.' 'serial No.-29s,795.

To all whom it may concern:

' Be it known that I, OsoAR WooDWARD, citizen of the United States, and resident of the borough of Manhattan, city of New York', in the countyof New York and State of New York, have invented certain new and usefulv Improvements in Ty e-Writing Machines, of which the following 1s a specification. i

My vinvention relates to back spacing mechanism for typewriting machines, for effecting a step-by-step feed of the carriage from left to right, or in a direction opposite.

to that given it during the printing operation. f

My invention is in the nature of an limprovement on the construction sh own in the] patent granted toBar-ron @c Merritt, No..

783,669, dated February 28th, 1905, and the` object of said invention is to provide-simple and eflicient back spacing mechanism that.

can :be readily applied to existing forms pff.

hereinafter appear, my invention consists in the features of construction, arrangements of arts and combinations of devices to be hereinafter described and particularly pointed out in the appended claims.

n the accompanying drawings wherein like reference charactersindica-te corresponding parts 1n the various v1ews,F1gure 1 1s -a vertical front to rear. sectlonal view, `taken centrally of the machine, and showing suiiicient number of parts of one form of type- Writing machine to illustrate my invention in its application thereto.

Fig. 3 is anenlarged detail rear elevation,

with parts in section, `of a portion of the 'backi spacing mechanism. Fig. 4 is an -enlarged fragmentary perspective view of a portion of the same.- Fig. 5 1s an enlarged detail -vertical sectional view showing a portion of the escapeinent and back spacing mechanisms,y the section being taken vlongitudinally ofthe Fig. 6 is a trans esoapenrent Iwheel shaft. verse sectional view of the same, taken on the line -x of Fig. 5 and looking in the'direction of the-arrow at said line.

parts' canbe readily assern- Fig. 2 'isa rear e'le-v vation of the same with the carriage omitted.

The frameof the machine comprises a base V1, corner posts 2 and a top plate3. Brackets 4 extend upwardly from the top plate and supporta track 5 substantially U-shaped in cross section with oppositely disposed grooved Iraceways 6 which 4cooperate with rollers 7 '.carried by'a carriage'truck 8. The truck has linksQ pivoted thereto at 10, the upper ends of 4said links being ivoted at 11 to a platen frame 12 in which t e usual rotary platen v13 is mounted. A central arm 14 projects forety ward-from the platen frame and supports roller 15 which is received in a grooved trackway 16 of a yshift rail 17, which may be moved by' a key at the keyboard of the machine in the usual manner. The rollers 7 and 15 thus support the carriage for travel from side to side ofthe machine.` A 'feed rack 1S is carried `by 'the truck and cooperates with a feed pinion 19 which has a hub 20 secured to a shaft 21 by a pin 22 that extends through the hub and shaft. The shaft 21 is mounted at `its'forwar'd endportion in a bearing 23 depending lfrom Ithe LUS-shaped track 5. The rear end portion of the shaft is supported in a bearing 24 y formed as a part of a `bracket 25` secured by screws 26 to the top plate 'of the machine. 'The shaft 21 projects rearwardly beyond the .bearing 24 and has a backspacing wheel 27 connected thereto. The back spac-v ing wheel has -aforwardlyprojecting hub 28 which bears against the rearend of the bean ing 24 and a screw'29 is received in a threaded opening in the "hub and projects through said opening into an opening'in the shaft 21 so as tosecure the :back-spacing lratchet wheel 27 to the shaft. From'anf inspection of-Fig. A5 it will 'be seen that 'the hub of lthe War face ofthe bearing 23 and prevents longitudinal movement of the shaft 21 -in its bearings ytow/wirds the -rear ofthe machine, whereas 'the hub ,28 bears against the rear face of the bearing 24 and: revents a longitudinallnovement of thevs aft towards t ie iront of the machine. A' backing ratchet wheel 30 is secured to or formed integral with I the back spacing wheel 27 and is surrounded by a lcylindrical housing 31 formed by2 a flange which extends forwardly. from an es capement wheel 32 loosely mounted on the shaft 21. Backing pawls v33 `(FigL 6) are pivo't'ed onheaded pins34 to the forward face of 'the escapement Wheel, and flat springs esca-(pement pinion 19 'bears -against the for l bear at their free ends against the pawls to force the noses thereof into engagement with the teeth of the coperating backing ratchet ".30, the other end of each of said springs being secured to the cylindrical housing 3]., as indi-.

cated at 36. The escapement wheel 32 is provided with. the usual teeth 37 with which Densmore machine and the illustration of feed dogs 38 cooperate, the dogs being carried b'yan upright-arm 39 of a dog rocker 40. pivoted at 41 to depending arms 42 of the bracket 25. `A restoring spring 43 is connected at .carriage under the pressure of the usual spring drum (not shown).

It will be understood that the printing keys, type bars, spring drum, and means for actuating the dog rocker are of the usual construction employed, for instance, in the these parts is not deemed necessary.

The esoapementwlieel 32 is loosely mounted on a reduced part 47 at the rear end of the shaft 21 and bears at the forwardsidegthereof against a shoulder 48 formed at the junction of the body of the shaft and thereduced part 47 thereof. A rearwardly extending hub 49 is formed onv the escapement wheel and a washer 50 bears against the outer end of the hun and with the shoulder 48 prevents a longitudinal movement of the escapement wheel on the-shaft'21. A headed screw 5Ga has-a stein'which is received in a threaded opening in the rear end of the shaft 21; the head of the screw bearing against the washer 50, thus holding the parts in lace.

The construction is such 'that the shaft 21 may turn independently of the escapement wheel in one direction but the engagement of the pawls 33, which arecarried by the escapement wheel, with the backingratchet 30 prevents a rotationv of the shaft 'independently of the escapeinent wheel in an opposite direction; AThe escapement wheel may be removed'without disturbing any other parts of the mechanism, by removing' the screw 50a and'slip'ping the-escapement wheel off` the end of the Ishaft.

The bracket 25 has a rearwardly extending4v arm 51 Vwhich has a transverse guide slot or opening 52 'extending therethrough for'the' reception of a back spacing pawl 53' thateX- tends through the opening andis guided by the side walls thereof. A transverse pin 54 extends across the 4upper portion of the slot and limits the upward movement of the paf-ffl and prevents removal of thepawl 53 upwardly from the guide slot.- The back spacing pawl is rigidly connected to or formsv l .-partof a horizontal, :longitudinally moving'4 rod 55 and is attened yon'its sides, as'indicated at 56,- for coperation with the side walls of the guide slot 52. Astop pin 57 is carried by the rod or pawl and is adapted at the last rearwardlyv extending arm 51 to limit the feed movement of the awl.` The free end of the back spacing paw and rod is supported on a sliding pin 58 which is received and guided within an opening 59 formed in the arm`51 and a spring 60-bears at'one end against the under side of the pin'andat its opposite end against an adjusting screw 61 which is'received in 'a threaded opening in ortion of the back spacing movement of t e pawl to Contact with a side ofthe the under side of the arm 51.v The construction just described affords a springpressed guiding support for the free, or' pawl supporting, endof' the rod 55 for purposes which will hereinafter more clearly appear. The right-hand end of the rod 55 is connected by a' pivotscrew 62 toa crank arm 63 secured by a screw 64 to a rock shafty 65. The rock shaft is supported in abearing 66 which is secured to and projects downwardly from the track 5. A coiled spring 67 surrounds a part of the bearing 66 and is connected at one end to the screw 64-and at its opposite end 67 8to the bearing` 66; the tension of the spring be# ing exerted. to turn the rock shaft so as to move the crank arm 63 thereon to. the left in i' Figs. 2 andl 3. The'forward endof the rock shaft 65 projects beyond its bearing andhas a crank arm 68 secured thereto. A depending link '69 is pivoted to the crankarm at 70 and has its lower end pivoted at 71 to a' key lever 72 fulcrumed at 73 in the ibase of the machine and provided witha finger key 74 at the keyboard ofthe machine.

In the normal positions of the parts the back-spacing pawl` 53 is maintained out of movement yof the escapement wheel is effected by the pressureexerted from .the spring'drum (not shown) on the carrlage which transmits movement to the rock shaft 21 through the feed rack 18 and pinion 19.`

The movement thus transmitted to the rock shaft tends to turn .the backing ratchet 30 in-the direction of the arrow in Fig. 6 and motion is transmitted from said -ratchet through vthe pawls 33 to the escapement wheel. When the carriage is moved back to begin a new line of writing the shaft 21 will be turned independently of the escapeeecyzee ment wheel the pawls 33 at this time riding freely on and not engaging the teeth ofthe ratchet wheely 30. During this backward movement of the carriage, the escapement wheel is prevented from being displaced by a back stop pawl 75 (Fig. 2) which is pivoted at 76 to the rearwardly projecting arm 51 and is pressed into engagement with the wheel by a spring 77. This pawl is. moved to the left in Fig. 2, during the movement of the escapement wheel in the direction of its feed indicate-d by the arrow in said figure.

Should the operator desire to effect a backward step-by-step feed of the'carriage it is merely necessary to depress the finger key 74, thus transmitting movement to the rock shaft 65 which will cause the rod 55, connected therewith through the crank arm 63, to be vibrated towards the back-spacing ratchet wheel 27, bringing it into engagement with a tooth of said wheel and a further movement of the rod will transmit a turning movement from the baclnspacingwheel 27 in the direction of the arrow in Fig. 3. This movement of the back spacing ratchet Wheel will be transmitted through the shaft 21 to the pinion 19, and from the pinion to the carriage through the feed rack 13. A single depression of the key 74 is sufficient to move the carriage through the back spacing wheel andintermediate connections a single letter space distance. Thus, a .depression of the key 74 causes the backing ratchet 30, connected to the back spacing wheel, to be moved the distancerbetween two of its teethland each of the pawls 33 en-V gages the next succeeding toothwhen the carriage will be heldin the position to which it has beenI moved, it being borne in mind that at this time the escapement wheel and -the pawl's 33 carried thereby are fixed against rotation; As the pawl 53 is forced into engagement with the teeth on the back-spacing -ratchet Wheel and moves the same in the direction of the arrow in Fig. 3, the pawl will receive a downward movement as the wheel turns to the position indicated in Fig. 3, and the spring will be compressed by this downward or lateral movement of the back spacing awl in its guide.`A When pressure on the ger key is released the spring 67 will restore the rock shaft 65 and the parts connected therewith to their normal posi tions, thus withdrawing the pawl 53 from engagement with the back-spacing wheel 27. The supporting springyO will' yield, if necessary,A during the Withdrawal of. the pawl -from engagement with the back spacing Wheel, thereby preventing a jamming of the parts which would tend to lock them in the actuated position and prevent them from being restored. to their normal positions by the spring 67. When the paw! 53 is withdrawn. from engagement with the ratchet Wheel 27, said pawl is raised by. the springpressed plunger 53 into engagement with the pin 54, when said pawl is in position to engage the. next tooth of the ratchet.

The carriage construction shown is not claimed herein, as it is made the subjectm'atter of a separate application, Serial No. 299,536, filed February 5th, 1906.

hat i claim as new and desire to secure by Letters Patent, is y- 1). in a typewriting machine, the combination of a carriage, a feed rack therefor, a feed pinion meshing with said rack, a loose escapement wheel, a back spacing ratchet wheel operatively connected to said feed pinion, means for operatively connecting said back spacing wheel and the eseapement wheel to turn together in one direction but not in the other, a horizontally moving rod having a hack spacing pawl formed integral therewith at one end ofthe rod, said pawl cooperating with the back spacing wheel,v a rock shaft extending .fore and aft of the machine, a crank arm on said rock shaft, which crank arm is connected to said horizontally moving rod, and a key at the keyboard of the machine for actuating said rock shaft.

2. In a typewriting machine, the combination of a carriage, a feed rack therefor, a feed pinion meshing with said rack, a loose escapement wheel, a back spacing ratchet wheel operatively connected to said feed pinion, means for operatively connecting said )back spacing wheel andthe escapement wheel to turn together in one direction but not in the other, a rod having a back spacing pawl, a spring-pressed guiding support for said rod, and a key for actuating said rod.

3. In a typewriting machine, the combination of a carriage, a feed rack therefor, a feed -pinion meshing with said rack, a loose escapement wheel, a 'back' spacing ratchet wheel operativelyvconnccted to said feed pinion, means for operatively.connecting said backspacing wheel and the escapement wheel to turn together in one direction but not in the other, a horizontally moving rod having a back spacing pawl formed integral therewith at one end of the rod, said pawl cooperating with saidvback spacing wheel, a spring-pressed support on which said rod is supported andguided in its movements towards and away from'the back spacing wheel, a rock-shaft extending fore and aft of the macrank arm is connected to said horizontally moving rod, and a key at' the keyboard of the machine for actuating said rock shaft.

4. In a typewriting machine, the combination of a carriage, a feed rack therefor, a feed pinion lmeshing with said rack, a loose cscapement wheel, a back spacing ratchet wheel operatively connected t'o saidfeed pinion, means for operatively connecting said back spacing wheel and the escapement wheel to turn together in one direction but chine, a crank arm on said roek'shaft, which y operatively connected to said feed pinion, -mcans for operatively connecting said back spacing wheel and the escapement wheel to turn together in one direction but not in the other, a horizontally moving rod carrying a rigidly connected back spacing pawl, a fixed member having an opening through `which the pawl passes and by which it is guided, a

spring pressed pin on which the pawl bears and -by which it is supported, and a key for actuating said pawl.

6. In a typewriting machine, the combina tion of a carriage, a feed 'rack therefor, a fee pinion meshing with said rack, a loose escapement wheel, aback spacing ratchet wheel operatively connected to said feed pinion, means for operatively connecting said back spacing wheel and the escapement wheel to turn together in one direction but not in the other,'a horizontally moving rod carrying a rigidly connected back spacing pawl, a fixed guide having a guide opening through which the pawl passes and by which it is guided, a stop carried. by said rod and coperatin'g with said /xed guide to limit' the spacing movement of said rod and pawl, a s ring support on which the pawl bears, an a key at the lkeyboard of the machine for actuating said pawl.

7.',In a typewriting machine, the combination o f a carriage, a feed rack therefor, a feed key at the keyboard of the machine pinion meshing with 'said rack, a loose escapement wheel, a back spacing ratchet wheel operatively connected to-said feed pinion,

means for operatively connecting said back' spacing wheel and the escapement wheel to A Aturn together in .one direction but not in the other, a back spacing pawl which co erates with the back spacing wheel, a fixe guide having a guiding slot in which said pawl moves, a spring-which cooperates with the pawl and-yields when the pawl is deflected laterally in its guide by engagement with theA co eratin back s acinor wheel means for adjusting the tension of said spring, and a for actuating said pawl; l

8. In a typewriting machine, the combination of a carriage, a feed rack therefor, a feed pinion meshing with said feed rack, a'shaft for said pinion, a bearing for said shaft, adetachable esc'apement wheel loosely mounted on the rear end of said shaft and whichmay be mounted in place or removed without re-v moving any of the other parts of the structure, a'sleeve formed with back-spacing andv backingratchet wheels thereon and which is i connected to said shaft by a set screw and bears at one end against the bearing for the shaft to prevent a longitudinal movement of t the shaft in one direction, pawls carried by lthe escapement wheel and co erating with the backing ratchet wheel, an a key actuated back spacing pawl which cooperates'.

with said back spacing ratchet whee Signed at the borough of Manhattan, city of New York, inthe county vof New York, and State of New York, this 430th" day of January, A. D. r1906.

' OSCAR WooDwAnD.

Witnesses:

E. M. WELLS, M. F. HANNWEBER. 

